Let f and e represent the amount of 40% and 80% solutions used...
We are told the f+e=20 which means that f=20-e and we can say that:
(.4f+.8e)/20=.7, using f=20-e in this equation we see that:
.4(20-e)+.8e=14
8-.4e+.8e=14
8+.4e=14
.4e=6
e=15, and since f=20-e then
f=5
So 15 quarts of 80% solution is mixed with 5 quarts of 40% solution to produce a 20 quart mixture of 70% solution.
Answer: 1 and 5
Step-by-step explanation:
Why I chose 1 and 5 because I thought of adding 1+1 and get 2 then add 5+2 equals 7 then add 2+7 and get 9
Hope this helps!
Answer:
7.5
Step-by-step explanation:
It is greater because it is closer to 8.
Answer:
<h2>125 tickets for an adult</h2><h2>and 175 tickets for a student</h2>
Step-by-step explanation:
Answer:
544,000
Step-by-step explanation:
